Use this proportion calculator to find missing values in proportional relationships. It uses two methods such as cross-multiplication and proportion formula to represent the equality between two ratios.
“When two ratios are set equal to each other, then it is called a proportion”
The symbol of proportion is ‘::’ and ‘=’.
Two variables are said to be directly proportional if one variable is equal to the product of the other variable and a constant. If the product of the two variables is a constant, then they are said inversely proportional ( x·y is a constant).
The formula for proportion is stated as:
a:b::c:d=
There are two main and easiest ways to solve proportions:
We have used both in the given example for better understanding:
The two ratios are 8:?::6:4, solve for the unknown variable x.
Solution:
Using Cross Multiplication:
Step #1: Construct a Proportion
Step 2: Apply Cross Multiplication
Using The Proportion Formula:
a:b::c:d=
In this example, we have found the proportion manually. But for more complex problems, you can use the above proportion calculator.
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